From e38f13bd6408769c0b565bb1079024f496eee121 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <florian@openwrt.org>
Date: Mon, 28 Jan 2013 20:06:27 +0100
Subject: [PATCH 09/11] MIPS: BCM63XX: add support for the on-chip EHCI
 controller

Broadcom BCM63XX SoCs include an on-chip EHCI controller which can be
driven by the generic ehci-platform driver by using specific power
on/off/suspend callbacks to manage clocks and hardware specific
configuration.

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
---
 arch/mips/bcm63xx/Makefile                         |    2 +-
 arch/mips/bcm63xx/dev-usb-ehci.c                   |   92 ++++++++++++++++++++
 .../asm/mach-bcm63xx/bcm63xx_dev_usb_ehci.h        |    6 ++
 3 files changed, 99 insertions(+), 1 deletion(-)
 create mode 100644 arch/mips/bcm63xx/dev-usb-ehci.c
 create mode 100644 arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_usb_ehci.h

--- a/arch/mips/bcm63xx/Makefile
+++ b/arch/mips/bcm63xx/Makefile
@@ -1,7 +1,8 @@
 obj-y		+= clk.o cpu.o cs.o gpio.o irq.o nvram.o prom.o reset.o \
 		   setup.o timer.o dev-dsp.o dev-enet.o dev-flash.o \
 		   dev-pcmcia.o dev-rng.o dev-spi.o dev-hsspi.o dev-uart.o \
-		   dev-wdt.o dev-usb-ohci.o dev-usb-usbd.o usb-common.o
+		   dev-wdt.o dev-usb-ehci.o dev-usb-ohci.o dev-usb-usbd.o \
+		   usb-common.o
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 
 obj-y		+= boards/
--- /dev/null
+++ b/arch/mips/bcm63xx/dev-usb-ehci.c
@@ -0,0 +1,92 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
+ * Copyright (C) 2013 Florian Fainelli <florian@openwrt.org>
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/usb/ehci_pdriver.h>
+#include <linux/dma-mapping.h>
+
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_regs.h>
+#include <bcm63xx_io.h>
+#include <bcm63xx_usb_priv.h>
+#include <bcm63xx_dev_usb_ehci.h>
+
+static struct resource ehci_resources[] = {
+	{
+		.start		= -1, /* filled at runtime */
+		.end		= -1, /* filled at runtime */
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= -1, /* filled at runtime */
+		.flags		= IORESOURCE_IRQ,
+	},
+};
+
+static u64 ehci_dmamask = DMA_BIT_MASK(32);
+
+static struct clk *usb_host_clock;
+
+static int bcm63xx_ehci_power_on(struct platform_device *pdev)
+{
+	usb_host_clock = clk_get(&pdev->dev, "usbh");
+	if (IS_ERR_OR_NULL(usb_host_clock))
+		return -ENODEV;
+
+	clk_prepare_enable(usb_host_clock);
+
+	bcm63xx_usb_priv_ehci_cfg_set();
+
+	return 0;
+}
+
+static void bcm63xx_ehci_power_off(struct platform_device *pdev)
+{
+	if (!IS_ERR_OR_NULL(usb_host_clock)) {
+		clk_disable_unprepare(usb_host_clock);
+		clk_put(usb_host_clock);
+	}
+}
+
+static struct usb_ehci_pdata bcm63xx_ehci_pdata = {
+	.big_endian_desc	= 1,
+	.big_endian_mmio	= 1,
+	.power_on		= bcm63xx_ehci_power_on,
+	.power_off		= bcm63xx_ehci_power_off,
+	.power_suspend		= bcm63xx_ehci_power_off,
+};
+
+static struct platform_device bcm63xx_ehci_device = {
+	.name		= "ehci-platform",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(ehci_resources),
+	.resource	= ehci_resources,
+	.dev		= {
+		.platform_data		= &bcm63xx_ehci_pdata,
+		.dma_mask		= &ehci_dmamask,
+		.coherent_dma_mask	= DMA_BIT_MASK(32),
+	},
+};
+
+int __init bcm63xx_ehci_register(void)
+{
+	if (!BCMCPU_IS_6328() && !BCMCPU_IS_6358() && !BCMCPU_IS_6362() && !BCMCPU_IS_6368())
+		return 0;
+
+	ehci_resources[0].start = bcm63xx_regset_address(RSET_EHCI0);
+	ehci_resources[0].end = ehci_resources[0].start;
+	ehci_resources[0].end += RSET_EHCI_SIZE - 1;
+	ehci_resources[1].start = bcm63xx_get_irq_number(IRQ_EHCI0);
+
+	return platform_device_register(&bcm63xx_ehci_device);
+}
--- /dev/null
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_usb_ehci.h
@@ -0,0 +1,6 @@
+#ifndef BCM63XX_DEV_USB_EHCI_H_
+#define BCM63XX_DEV_USB_EHCI_H_
+
+int bcm63xx_ehci_register(void);
+
+#endif /* BCM63XX_DEV_USB_EHCI_H_ */
